<?php
/**
 * Smarty plugin
 *
 * @package Smarty
 * @subpackage PluginsModifier
 */

/**
 * Smarty truncate modifier plugin
 *
 * Type: modifier<br>
 * Name: truncate<br>
 * Purpose: Truncate a string to a certain length if necessary,
 * optionally splitting in the middle of a word, and
 * appending the $etc string or inserting $etc into the middle.
 *
 * @link http://smarty.php.net/manual/en/language.modifier.truncate.php truncate
 *       (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com>
 * @param $string string
 *       	 input string
 * @param $length integer
 *       	 length of truncated text
 * @param $etc string
 *       	 end string
 * @param $break_words boolean
 *       	 truncate at word boundary
 * @param $middle boolean
 *       	 truncate in the middle of text
 * @return string truncated string
 */
function smarty_modifier_truncate($string, $length = 80, $etc = '...', $break_words = false, $middle = false) {
	if ($length == 0)
		return '';
	
	if (Smarty::$_MBSTRING) {
		if (mb_strlen ( $string, Smarty::$_CHARSET ) > $length) {
			$length -= min ( $length, mb_strlen ( $etc, Smarty::$_CHARSET ) );
			if (! $break_words && ! $middle) {
				$string = preg_replace ( '/\s+?(\S+)?$/' . Smarty::$_UTF8_MODIFIER, '', mb_substr ( $string, 0, $length + 1, Smarty::$_CHARSET ) );
			}
			if (! $middle) {
				return mb_substr ( $string, 0, $length, Smarty::$_CHARSET ) . $etc;
			}
			return mb_substr ( $string, 0, $length / 2, Smarty::$_CHARSET ) . $etc . mb_substr ( $string, - $length / 2, $length, Smarty::$_CHARSET );
		}
		return $string;
	}
	
	// no MBString fallback
	if (isset ( $string [$length] )) {
		$length -= min ( $length, strlen ( $etc ) );
		if (! $break_words && ! $middle) {
			$string = preg_replace ( '/\s+?(\S+)?$/', '', substr ( $string, 0, $length + 1 ) );
		}
		if (! $middle) {
			return substr ( $string, 0, $length ) . $etc;
		}
		return substr ( $string, 0, $length / 2 ) . $etc . substr ( $string, - $length / 2 );
	}
	return $string;
}

?>